SiBE341027
Troubleshooting by Remote Controller
Service Diagnosis
107
Troubleshooting
Note:
*1: Make a comparison between the voltage of the pressure sensor and that read by the pressure gauge.
(As to the voltage of the pressure sensor, make measurement of voltage at the connector, and then convert it to pressure.)
*2: Make measurement of voltage of the pressure sensor.
Refer to P.179
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Check for the points shown below.
(1) Is the stop valve opened?
(2) Are the high pressure switch and pressure switch
connector properly connected to the main PCB?
(3) Do the high pressure switch and pressure switch have
continuity?
(1) Mount a pressure gauge on the high pressure service port
and dual pressure gas stop valve service port.
(2) Reset the operation using the remote controller, and then
restart the operation.
NO
NO
NO
NO
NO
YES
YES
NO
NO
YES
YES
YES
YES
Rectify defective points,
if any.
Replace the high
pressure switch and
pressure switch.
Replace the high
pressure sensor.
Replace the outdoor
unit main PCB (A1P).
Is the
pressure switch
operating value normal
(i.e., 3.3MPa)?
Are the
characteristics of the
high pressure sensor
normal? (*1.)
Check if the “high
pressure” value and the
actual measurement value
by pressure sensor are
the same.
Is the high
pressure switch
operating value normal
(i.e., 4.0MPa)?
Service Checker
Connect the service checker to compare the “high pressure” value and the
actual measurement value by pressure sensor (*1) by using the service
checker.
· The high pressure sensor is normal, and the pressure detected with the PCB are also normal.
· The high pressure or field piping pressure has really become high.
CHECK 1
Remove the causes by which the high pressure or field piping
pressure has become high.
Are the two points
above OK?
Does the stop
due to error
(
E3
) recur?
CHECK 1
